This got me looking to see if there is any way to have a fallback as I have had something similar happen to me.
The general advice is to have a liveboot USB around. I even saw that you can have GRUB simply boot from an .iso file on the internal drives, which eliminates the need to keep a USB stick around.
I haven’t followed the steps yet but I’ll give this a shot because it intrigues me.
https://www.linuxbabe.com/desktop-linux/boot-from-iso-files-using-grub2-boot-loader
There hasn’t been a release in some time but work is still being done.
https://github.com/NeoApplications/Neo-Launcher/commits/main/